Abstract
The temperature-concentration conditions of formation and regions of liquid-crystalline-phase existence in concentrated solutions of methyl cellulose, hydroxypropylmethyl cellulose, cellulose diacetate, and cellulose triacetate in trifluoroacetic acid are studied via optical methods. It is shown that the type of anisotropic structures is largely determined by the pitch of the cholesteric helix. An increase in the strength of acetate films corresponding to the maximum optical anisotropy in the two-phase region of transition of cellulose acetates solutions to the LC phase is found.
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Original Russian Text © O.A. Khanchich, S.A. Kuznetsova, 2011, published in Vysokomolekulyarnye Soedineniya, Ser. A, 2011, Vol. 53, No. 4, pp. 547–552.
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Khanchich, O.A., Kuznetsova, S.A. Temperature-concentration conditions of liquid-crystalline-phase formation in cellulose ethers and esters in trifluoroacetic acid. Polym. Sci. Ser. A 53, 311–316 (2011). https://doi.org/10.1134/S0965545X11040055
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DOI: https://doi.org/10.1134/S0965545X11040055